How do I change my wallet password?
By default, your 29-word seed is your Sia-UI wallet password. This means that - as long as no one knows your seed - wallet security is very high because the seed is so long. If you’d like to change the password to something custom, you have two ways to do it.
One is when you first create your wallet. During initialization you have an option to create a custom password.
Another is after your wallet has been created. Go to the Wallet tab and click ‘Change Password’.
Your password is simply used to unlock your wallet, and should be stored safely. If you lose your password but still have your seed, your Siacoin can be recovered.
Losing your 29-word seed means that you will lose access to your funds. So be careful with it.